A text-to-HTML formatting syntax for web writers, implemented as
a plug-in for Movable Type, Blosxom, and BBEdit. Markdown allows you
to write using an easy-to-read, easy-to-write plain text format, then
convert it to structurally valid XHTML (or HTML).

Vesper is a simple and elegant tool for collecting notes, ideas, things to do — anything you want to remember. Vesper lets you use tags to group related items into playlist-like collections, and now offers fast, reliable cloud-based syncing.

Command-line interface to BBEdit’s Find Differences command on Mac OS X. (Obsoleted by BBEdit 8.0's official ‘bbdiff’ tool (which is not based on mine), but some people still prefer using this script.)